There may be a lot of reasons but I understand that few of the OGs of the bitcoin scene are here only and historically a lot of information on this forum is worth knowing for understanding the proper approach to crypto.
Social media tends to put up a skewed approach to anything they publish about. I dont trust news media or social media to that extent but things have improved there as well.
This forum also thrives on its signature campaigns, without which I guess it would not have so much traffic.
There, people are usually honest regarding general topics and you are likely to have the answer you seek faster than anywhere else, I mean X or somewhere else.
Also, scams are not as rampant due to the members acting quickly on it, usually, not like on the bigger socials.